There are known knowns which, had we known, we would never have wished to know. It is known that this also applies to the known unknowns. However, when one attends a hearing, Mr Rumsfeld's idea that there are also unknown unknowns fails to apply because, anyone who is in the know, knows that unknown unknowns are purely a deception otherwise known as an aleatory experience or also known as a lottery. I know that I know this to be a fact and, in this knowledge, I know that I am fully prepared to present my case but, paradoxically, in full knowledge that the unknown unknowns may well apply. "Hippocrates"